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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10212366 B1

PDFFull Text
Date of Patent:
Feb. 19, 2019

Filed:

Jun. 17, 2016

Iris image acquisition system

Applicant:

Fotonation Limited, Galway, IE;

Inventors:

Christopher Dainty, Galway, IE;

Alexander Goncharov, Galway, IE;

Niamh Fitzgerald, Galway, IE;

Assignee:

FotoNation Limited, Galway, IE;

Attorney:
Primary Examiner:

Mohammed S Rahaman

Assistant Examiner:

Richard A Hansell, Jr

Int. Cl.
CPC ...
H04N 9/47 (2006.01); H04N 7/18 (2006.01); H04N 5/33 (2006.01); G06K 9/00 (2006.01); H04N 5/225 (2006.01); G02B 27/00 (2006.01); G02B 13/00 (2006.01); G02B 13/14 (2006.01); G02B 13/18 (2006.01); H04N 5/232 (2006.01);
U.S. Cl.
CPC ...
H04N 5/33 (2013.01); G02B 13/003 (2013.01); G02B 13/008 (2013.01); G02B 13/146 (2013.01); G02B 13/18 (2013.01); G02B 27/0075 (2013.01); G06K 9/00597 (2013.01); G06K 9/00604 (2013.01); H04N 5/2253 (2013.01); H04N 5/2254 (2013.01); H04N 5/2256 (2013.01); H04N 5/23219 (2013.01); H04M 2250/52 (2013.01);
Abstract

An iris image acquisition system comprises an image sensor comprising an array of pixels including pixels sensitive to NIR wavelengths; at least one NIR light source capable of selectively emitting light with different discrete NIR wavelengths; and a processor, operably connected to the image sensor and the at least one NIR light source, to acquire image information from the sensor under illumination at one of the different discrete NIR wavelengths. A lens assembly comprises a plurality of lens elements with a total track length no more than 4.7 mm, each lens element comprising a material with a refractive index inversely proportional to wavelength. The different discrete NIR wavelengths are matched with the refractive index of the material for the lens elements to balance axial image shift induced by a change in object distance with axial image shift due to change in illumination wavelength.

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